22.01.2023

jamie says the value of the expression 1.43 • (-20/39) is close to -0.75. Does jamie’s estimate seem reasonable explain

. 9

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Mathematics
Step-by-step answer
P Answered by PhD
Yes. Jamie's estimate seem reasonable.
This is because, when we expand the expression 1.43 x (-20/39) we get;

1.43 x (-20/39) = -0.73333... (3 is repeating)

Her estimate was -0.75 while the actual answer is -0.73333...
This is a good estimate since the difference is 0.016666 which is negligible. 
Mathematics
Step-by-step answer
P Answered by PhD
Yes. Jamie's estimate seem reasonable.
This is because, when we expand the expression 1.43 x (-20/39) we get;

1.43 x (-20/39) = -0.73333... (3 is repeating)

Her estimate was -0.75 while the actual answer is -0.73333...
This is a good estimate since the difference is 0.016666 which is negligible. 
Mathematics
Step-by-step answer
P Answered by PhD
Answer: 440 grams for 1.54 is the better value
Explanation:
Take the price and divide by the number of grams
1.54 / 440 =0.0035 per gram
1.26 / 340 =0.003705882 per gram
0.0035 per gram < 0.003705882 per gram
Mathematics
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P Answered by PhD

Cost of 7 gallons=$24.50

Cost of 1 gallon=24.50/7=3.5

Cost of 15 gallons=15*3.5=52.5

Cost of 15 gallons will be $52.5

Mathematics
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P Answered by PhD
The answer is in the image 

The answer is in the image 

Mathematics
Step-by-step answer
P Answered by PhD

F=ma

where F=force

m=mass

a=acceleration

Here,

F=4300

a=3.3m/s2

m=F/a

    =4300/3.3

    =1303.03kg

Mathematics
Step-by-step answer
P Answered by PhD

F=ma

where F=force

m=mass

a=acceleration

Here,

F=4300

a=3.3m/s2

m=F/a

    =4300/3.3

    =1303.03kg

Approximately it is aqual to 1300kg

Mathematics
Step-by-step answer
P Answered by PhD

The answer is in the image 

The answer is in the image 
Mathematics
Step-by-step answer
P Answered by PhD

Speed=Distance/time

Here,

distance=15m

time=1sec

speed=15/1=15m/sec

Distance=Speed*time

time=15min=15*60sec=900sec

Distance travelled in 15 min=15*900=13,500m

=13500/1000 km=13.5Km

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